This is a vintage Taxco brooch made of sterling silver with a clover design. The brooch features a green pearlescent mother of pearl/abalone stones. 

Stamps in a circle are TAXCO, MEXICO, 925 and in the center are initials that might be ABB.  
On the stem appears to be the numbered eagle mark but it is difficult to determine which one.  

We work directly with Estate and Tag sale companies, buying their clients' jewelry and other small valuables apart from the in-home sale.  This was part of such a sale.

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